法线
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内法线与外法线的区别是什么？？
在高中学习三维立体空间会接触到三维平面的法线，对于法线的了解是至关重要的，它是学习三维的重点，也是难点。法线又分为内法线与外法线两种，对于刚进入三维空间的学生对于两者不是很清楚，常常会把两者搞混，接下[详细]
2023-02-05 13:07 分类：问答How to search through a NSMutableArray
I have a NSMutableArray that I need to search for a string and return the key in the array where the string was found. So for example if I\'m searchi开发者_运维问答ng \"ipod\" and it\'s the 4th in the[详细]
2022-12-26 13:43 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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